Cream together the butter or margarine, flavoring, sugar, egg yolks and 1 egg white. Work in the flour with the fingers. Force through cookie press onto ungreased baking sheet in shape of wreaths. Beat remaining egg white until slightly frothy, and brush cookies. Sprinkle with colored sugar or cinnamon sugar. Bake in moderate oven (350 F.) 8 to 10 minutes. Yield: About 5 dozen.